Latency, Jitter and Packet Loss Test

Latency vs. jitter: not the same thing

Latency is the time a packet takes to go and come back (RTT). Jitter is the variation of that latency between packets. A call can have low latency (30 ms) but high jitter (±25 ms), and it is the jitter that ruins video calls and games, because the data arrives at irregular intervals.

2.4 GHz vs. 5 GHz and packet loss

The 2.4 GHz band reaches farther but shares the spectrum with microwaves, Bluetooth and the neighbors' network, increasing loss and jitter. The 5 GHz band has less interference and more bandwidth, ideal near the router. Loss above ~1-2% is already felt in games and VoIP.